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Copyright 2007 The Closure Library Authors. All Rights Reserved.

Use of this source code is governed by an Apache 2.0 License.
See the COPYING file for details.
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<title>Closure Unit Tests - goog.math.Bezier</title>
<script src="../base.js"></script>
<script>
  goog.require('goog.math.Bezier');
  goog.require('goog.testing.jsunit');
</script>
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<script>

  function testEquals() {
    var input = new goog.math.Bezier(1, 2, 3, 4, 5, 6, 7, 8);

    assert(input.equals(input));
  }

  function testClone() {
    var input = new goog.math.Bezier(1, 2, 3, 4, 5, 6, 7, 8);

    assertNotEquals('Clone returns a new object', input, input.clone())
    assert('Contents of clone match original', input.equals(input.clone()));
  }

  function testFlip() {
    var input = new goog.math.Bezier(1, 1, 2, 2, 3, 3, 4, 4);
    var compare = new goog.math.Bezier(4, 4, 3, 3, 2, 2, 1, 1);

    var flipped = input.clone();
    flipped.flip();
    assert('Flipped behaves as expected', compare.equals(flipped));

    flipped.flip();
    assert('Flipping twice gives original', input.equals(flipped));
  }

  function testGetPoint() {
    var input = new goog.math.Bezier(0, 1, 1, 2, 2, 3, 3, 4);

    assert(goog.math.Coordinate.equals(input.getPoint(0),
        new goog.math.Coordinate(0, 1)));
    assert(goog.math.Coordinate.equals(input.getPoint(1),
        new goog.math.Coordinate(3, 4)));
    assert(goog.math.Coordinate.equals(input.getPoint(0.5),
        new goog.math.Coordinate(1.5, 2.5)));
  }

  function testSubdivide() {
    var input = new goog.math.Bezier(0, 1, 1, 2, 2, 3, 3, 4);

    input.subdivide(1/3, 2/3);

    assert(goog.math.nearlyEquals(1, input.x0));
    assert(goog.math.nearlyEquals(2, input.y0));
    assert(goog.math.nearlyEquals(2, input.x3));
    assert(goog.math.nearlyEquals(3, input.y3));    
  }
  
</script>
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